How disorienting it is to find century-old works in the concert repertoire of which you can still say “I’ve never heard anything like it”. That must have been the reaction of most audience members last night to Tuscan-German composer Ferruccio Busoni’s 85-minute symphony-concerto for piano, orchestra and male voice choir, since only a few will have caught what classical anoraks tell me was its only other London performance in recent years, at the 1988 Proms.

It’s a dark and Danish so of course there is a body. But it’s not that sort of body. The Legacy parts company from what we know of most Nordic television drama. It’s neither a fetid charnel house in which the cops are as freaky as the killers. Nor is it a place of sunshine, smiles and proportional representation. Instead, the latest export from the Danish broadcaster DR belongs to an older form of Scandinavian storytelling: the anguished family saga in which bombs planted back in the distant past detonate in the present. Think Ibsen with Volvos.

Sofie Gråbøl as Danish royalty: it hardly stretches credulity. The face of Nordic noir has been a star in her home country ever since appearing in Bille August's Pelle the Conqueror in 1987, but is solely familiar on these shores as Sarah Lund, the jumpered Copenhagen detective from three unmissable series of The Killing. This autumn the only thing that will be recognisable about Gråbøl will be those big blue eyes as she is spirited back to the late Middle Ages, bewigged, bejewelled and billowing, to play a queen of Scotland.

Some things that spread like wildfire, like ebola and wildfire itself, are not good news at all. But performing Nielsen’s symphonies? That’s another matter entirely. In the next concert season, the BBC Symphony Orchestra and the Philharmonia both begin Nielsen symphony programmes, while the LSO several years ago cycled through one of their own with Sir Colin Davis. Yesterday, the BBC National Symphony of Wales and their current Danish conductor – will it ever be someone Welsh? – bit off one of the mightiest in the set, the battle-scarred Fifth, with its disruptive side-drum.

Rona Munro's history cycle may take some liberties with the facts, as the writer admits in the programme notes, but its broad narrative sweep has been talked about as a state-of-the-Scottish-nation trilogy. It's the first joint production of the National Theatre of Scotland and the National Theatre and the timing of its premiere at the Edinburgh International Festival couldn't be more pertinent – just a few weeks before Scotland votes on 18 September in the independence referendum.

At last night’s Eurovision Song Contest, host country Denmark submitted “Cliché Love Song”, a weedy Bruno Mars-a-like designed to ensure they did not win for a second year running. It came ninth. While understandable that Danish national broadcaster DR would try to duck the expense of staging the extravaganza in Copenhagen again in 2015, they could have displayed some imagination by choosing an entrant that was certainly not a winner but had some worth.

The British Museum's exhibition The Vikings: Life and Legend promises to redefine the Viking age for a new generation. First seen at the National Mueum in Copenhagen, it has now travelled - much as the show's subjects once did - across the North Sea. It includes objects from 25 lending institutions spread across nine countries - 10 if you include Scotland, whose national law requires export licence. To celebrate the exhibition, theartsdesk invited Dr Gareth Williams to pick 10 exhibits that walk us through the Viking story.

Stellan Skarsgård is having a good Berlinale. The veteran Swedish actor proved the main calming influence in Lars von Trier’s Nymphomaniac Volume One (***), which the Berlin festival screened as a world premiere in the director’s version, running at 145 minutes. That’s about 25 minutes more than the UK will be seeing from 21 February, when both parts of the work will be released.

The Saga saga is over. An eco-terrorist plot to kill off the top tier of Europe’s environment ministers has been foiled, with nails bitten to the quick. Various Nordic marriages are in tatters, like a boxed set of Strindberg. Justice has been done but the smiles on faces in the Malmö police station at the end of episode nine had been wiped an hour later. We can’t talk about why or the spoiler police will stick us in prison and pay us periodic visits with gifts of designer coffee. Let’s just say it wasn’t a good night for Danish law enforcement.

How come there is always a free parking space right outside the police station’s front door as Saga Norén draws up? If she has malodourous armpits, what must her manky leather trousers smell like? What does her partner in investigation Martin Rohde do to distract himself from her personal hygiene issues? Wouldn’t he do better to downsize his expensive car and use the money saved on renting an apartment rather than kipping in a hotel? All burning questions raised by the second series of the Danish-Swedish co-production The Bridge, currently being aired by BBC Four.